Chief of Defence Nuclear

Official account of Maddy McTernan CB, Chief of Defence Nuclear, Ministry of Defence

[Chief of Defence Nuclear @ChiefDefNuclear]

Great to welcome @UKCDS_MOD to Barrow last week. A valuable opportunity to see the incredible work happening across the yard and meet the teams driving forward our National Endeavour.

[Chief of Defence Nuclear @ChiefDefNuclear]

A proud moment for AUKUS as HMS Anson completes her Submarine Maintenance Period in Australia. The skills, trust, and relationships built here have strengthened the foundations on which the next 125 years of collaboration will be built.

[Chief of Defence Nuclear @ChiefDefNuclear]

This #BritishScienceWeek is a reminder that Defence Nuclear offers rewarding careers working on some of the most challenging and important problems facing our nation. #BSW26

[Chief of Defence Nuclear @ChiefDefNuclear]

This #NationalApprenticeshipWeek, we celebrate the thousands of apprentices developing the specialist skills our Defence Nuclear Enterprise depends on. Your talent is building the UK's future nuclear workforce and strengthening a vital national endeavour. #NAW2026

[Chief of Defence Nuclear @ChiefDefNuclear]

Maintaining our submarines is a top priority for the
DNE. Great to visit @HMNBClyde with @GenGJenkinsRM to see firsthand the teams driving a rapid, sustainable boost in maintenance output. Their work is critical to keeping the Fleet ready. #OneClyde

[Chief of Defence Nuclear @ChiefDefNuclear]

Congratulations to the @HMSOardacious crew on completing the World's Toughest Row. The Atlantic crossing raises vital funds for @RNRMC, supporting mental health and wellbeing for serving personnel and their families. An extraordinary achievement in the most demanding conditions.

[Destination Nuclear @Dest_Nuclear]

In Oct 2025, King Charles III visited @BAESystemsplc in Barrow-in-Furness to mark the commissioning of the UK’s newest Astute-class submarine.

Thousands at BAE are shaping the future of nuclear tech and innovation.

Explore roles: https://t.co/LwhQBUhnuT

#DestinationNuclear

[Chief of Defence Nuclear @ChiefDefNuclear]

Excellent to see Team Plymouth showcasing their defence growth plans at Westminster. The £4.4bn
investment in Devonport will enhance our submarine maintenance capability whilst driving regional growth
- vital for the DNE and the communities that support
our #NationalEndeavour

[Luke Pollard MP @LukePollard]

Plymouth is leading the way! Team Plymouth launched in Westminster to harness defence investment for jobs, skills & growth. Together we’ll make Plymouth a hub for innovation & opportunity. Proud to back this partnership for our city’s future. #TeamPlymouth

[Chief of Defence Nuclear @ChiefDefNuclear]

The #DNE has a growing demand for nuclear skills, providing new and exciting opportunities across the country. Find out what the nuclear sector has for you
https://www.destinationn
https://t.co/NijjuEUtEt

[Destination Nuclear @Dest_Nuclear]

📍 Are you based in the North West and looking for a career change? 📍

With over 400 roles currently open in nuclear in the NW, across fields and experience levels, and anticipated major investment, check out: https://t.co/Rvs9ya7JEz

#DestinationNuclear #Career

[Chief of Defence Nuclear @ChiefDefNuclear]

In solemn remembrance of the submariners who have given their lives in the service of our nation. Your courage, sacrifice + silent vigilance will never be forgotten. On behalf of the Defence Nuclear Enterprise, we honour your legacy and stand in gratitude.

[Chief of Defence Nuclear @ChiefDefNuclear]

A proud moment for the DNE! 👏 HMS Agamemnon successfully completed her first under water dive @BAEsystemplc in Barrow - a major milestone for everyone involved

[Chief of Defence Nuclear @ChiefDefNuclear]

Fascinating visit to our joint UK-France facility (EPURE) in Valduc together @TomDrewUK where cutting-edge technology is being used in hydrodynamic trials for the benefit of each of our programmes. An outstanding example of close collaboration by Europe’s two nuclear powers.

[Chief of Defence Nuclear @ChiefDefNuclear]

22 hours into the DNE 24hr Row with over 500 people rowing a staggering 3428km across 11 sites and 14 teams - with dozens of individual efforts and some truly outstanding endurance across the participants

Final push for donations - https://t.co/M4GXNKehM7
#DNERow #TeamDNE

[First Sea Lord and Chief of Naval Staff @GenGJenkinsRM]

Fitness is a war fighting essential. Pleased to take part in the DNE sponsored row today.

[Royal Navy in Scotland @RNinScotland]

Fleet Commander, Vice Admiral Stephen Moorhouse CBE had the honour of officially opening the 24-hour Row-A-Thon at #HMNBClyde today. The event is to raise money for the @hmsoardacious Fund.

[Naval Reactors @USNavyNNPP]

Kicking off 24 hours of grit, endurance & unity!
Adm. Bill Houston & Cdre. Gus Carnie launched #NROarSE2025 @USNavyNNPP rowing alongside our UK DNE partners at 11 locations.
Team NR is in. Let’s see what you’ve got, @maddymcternan and #TeamDNE!
#TeamNavalReactors #DNERow

[Chief of Defence Nuclear @ChiefDefNuclear]

All donations are appreciated as we support our submariner community. https://t.co/uu5Nw02kuN

[Chief of Defence Nuclear @ChiefDefNuclear]

The DNE 24-hour charity row has started with teams from @BAESystemsplc @RollsRoyce, @RoyalNavy, @ForgemastersHQ, @BDSUS, @Babcockplc, @USNavyNNPP supporting HMS OARDACIOUS and @RNRMC mental health initiatives by rowing continuously until 1200 tomorrow.

[Chief of Defence Nuclear @ChiefDefNuclear]

Fantastic to be with the Defence Secretary @JohnHealey_MP and Australian DPM @RichardMarlesMP in Australia for the signing of the Geelong Treaty confirming our AUKUS commitment for the next half century.

[Ministry of Defence 🇬🇧 @DefenceHQ]

An enduring defence partnership 🇦🇺🇬🇧

Today in Geelong the UK and Australia have signed a landmark treaty that sets out how our two countries will work together to deliver our respective SSN-AUKUS submarine programmes over the next 50 years.

Read more: https://t.co/U8aNzKCNNN

[Chief of Defence Nuclear @ChiefDefNuclear]

Pleasure to be at @BAESystemsplc Barrow yesterday with @MartinJConnell meeting some of the incredibly talented people from industry working on the next generation of our nuclear submarines #teamDNE